Electric weld remover



Feb. 11, 1930. R. R. CRAVENS v I 1,746,462

ELECTRIC WELD REMOVER Filed J ne' 18, 1928 5 Sheets-Sheet 1 InventorFeb. 11, 1930. I R. R. CRAVENS ELECTRIC WELD REMOVER I Filed June 18,1928 3 Sheets-Sheet 2 I f n'ven'tar Rhea R.C'1-avc=ns Feb. 11, 1930. R.R. CRAVENS ELECTRIC WELD REMOVER 5 Sheets-Sheet s Filed June 18, 1928 vInventor Rhea Rl-Crdvens Patented Feb. 11, 1930 RI-IEA R. CltAiVENS, OFBIG SPRING, TEXAS ELiao'rnro WELD nnivrovnn Application filed June 18,1928.

The present invention relates to an improved deviceto be hereinafterknown as an electric weld remover,, and it has more particular referenceto a structure employed for 5 removing the consolidated weld depositsfrom boiler tube beads which have become loose and leaky-and needrewelding. r c

YBriefly, the structure embodies an especially cast or madebody-constituting a mounting to fora plurality of adjustable cutters,and a series of freely rotatable guides and antifriction. elements. Thisbody is provided with a coupling adapted to telescopically fit into adriving chuck and -it;is bored for passage for atapered roller adjustingspindle.

The noveltylis predicated upon the eflicient organization of the partswhich cooperates inperrnittingthe device to fulfill the requirement of adevice of this class, in a dependable 29 and positive manner.

Figure 5 is a longitudinal sectional view .throughFigure 1, showing theinternal association .of partsmo're plainly. v c Figure 16'is a crosssection taken approximately upon the plane of the line 6-6 of Figure 5,looking in the direction of the arrows. h

Figure 7 .is an end View of Figure 1, looking in afdirection from leftto right. a Figures. is across section on the line 8-8 of F igure, 5. i

IFigure9 is a groupperspective view of the .cutterlcarrying body. a

Figure 10 is anenlarged view, taken on the linel10-10 of Figure 5.

Serial No. 286,329.

. Figure 11 is a perspective View of a retaining ring.

Referring now to the drawings by reference numerals, it will be observedthat 12 designates generally the improved cutter and roller carrieroribody. As before intimated, it is in the form of a casting 18,including a substantially disc like part having a forwardly projectingcentering neck 14, onthe endof which is a retaining washer 15. As shownin Figure 11, this washer is provided with small holes 16 for passage ofthe retainingbolt 17 and is provided with elongated slots 18, at itscircumferentially spaced points, for adjustable reception of thejournals on the ends of the internal guide rollers 19. In cidentallythese rollers fit withinthc tube and are disposed in rolling contactwith the interior of the tube. The part 13is formed at the inner end ofthe neck 14 with an annular groove having a bevelled flange 20 forconfining a cutter retaining spring 21. This spring is of the endlesscoiled type and engages the cutting element 22, as showniplainly inFigure 5. These cutting elements are mounted in notches in the peripheryof the body 13, as is evident from Figure 9. Cooperating with thecutters are grooved anti-friction and guide rollers 23, having theirstem portions 24: extending through radial jholes in the body.Incidentally the body is longitudinally bored and these stems extendinto the bore as shown in Figure 5.

Cooperating with the grooved rollers 23 are the aforesaid rollers 19.Both sets'of rollers are adjusted for extensive action pr0- duced \bythepresence of the longitudinally slidable tapered spindle or wedge pin 25.

Clhispin has a head on its inner end as at 26, and the head cooperateswith a pressure spring 27, located within the tool holder or socket 28.This socket is provided with the customary driving shank 29 to beoperatively associated with an air motor or the like. It will be notedthat the polygonal end extension 30 of a disc 31 fits telescopically inthe Pocket 28. This disc is bolted tothe body 13, and carries adjustablebolts 32, for the cutter 22.

As before intimated the device is employed for chipping and scraping oilthe consolidated metal deposits or electric weld from around the bead ofa boiler tube. Hence, it is obvious that the neck 14 of the carrier 12is inserted into the tube, whereby the rollers 19 come into contact withthe inner surface of the tube. The grooved rollers 23 engage the head onthe outer end of the tube. Then, when the device is set into rotation byappropriate means, the cutters act on the metallic deposit and scrape itofli cleanly, and leave a true surface for rewelding. It is evident thatthe spring pressed wedge pin 25 comes into adjusting engagement with therollers 19 and 23, adapting them to the particular diameter of the tubebeing acted on, so that the cutters 22 resting upon the rollers 23 arealso adjustably afiected, whereby the cutters may be adjusted withrespect to the diameter of the tube being acted upon.

Itis thought that by considering the description in connection with thedrawing, a clearunderstanding of the'invention will be had. Therefore amore lengthy description is regarded unnecessary.

Minor changes in the shape, size and rearrangement of parts may beresorted to, within the invention as set forth in the accompanyingclaims.

I claim:

1. An electric Weld remover comprising a body having a circumferentialgroove, and a centralized projection to fit telescopically within aboiler tube, a set of anti-friction rollers carried by said projectionfor engagement with the inner bore of the tube, a second set ofanti-friction rollers carried by said body and adapted to engage thehead of the boiler tube, said second set of anti-friction rollers havingtheir axes at right an des to the axes of the first mentioned set 0?antifriction rollers, cutters mounted on said body and arranged withinsaid groove, inoperative relation to said second set of anti-fr ctionrollers, and a spring arranged in said groove and bearing against saidcutters for urging said cutters into engagement with the last referredto series of anti-friction rollers.

2. An electric weld remover comprising a centrally bored cutter carrier,a plurality of cutters adjustably mounted on said carrier, an annularseries of anti-friction rollers ,mounted on said carrier and havingportions thereof disposed in the bore of said carrier, said rollersadapted to engage the inner bore of a boiler tube, means for mountingsaid rollers on said carrier for radial adjustment with respect to saidcarrier, a second series of grooved anti-frict on rollers mounted onsaid carrier and having their axes at right angles to the axes of thefirst mentioned rollers, said grooved rollers adapted to engage the beadof the bo ler ube, said last mentioned rollers embodying adjusting stemsextending through openings in said carrier into the bore of saidcarrier, and a spring pressed tapered wedge pin extending through thebore of said carrier for engagement with said stems, and with the firstmentioned rollers simultaneously to accommodate the tube acted upon, andthe stems at their outer ends adapted'to contact with said cutters foreffecting an adjustment of said cutters simultaneously with the outwardradial movement of all of said rollers.

3. A weld remover for tubes, comprising a carrier including a circularbody having peripheral notches and an endless groove, said body beingcentrally bored and formed with a centralized pilot extension forentering the tube, an annular series of anti-friction rollers carried onsaid extension, means for mounting said rollers on said extension forradial movement with respect to said extension for engagement with theinner bore of the tube, a series of grooved anti-friction rollers havingtheir axes at right angles to the axes of the first mentioned rollersWhereby said last mentioned rollers may engage the bead of the tube,said grooved anti-friction rollers including stems extending slidablythrough openings in said body, the inner ends of the stems beingcontrolled intermediate the first mentioned rollers, cutters mounted 1nsaid notches, an annular coil spring in said groove for yieldably urgingsa d cutters into engagement with the outer ends of said stems, and aspring pressed wedge pin movable longitudinally in the bore of said bodyfor engagement with the first mentioned rollers and the inner ends ofsaid stems whereby all of said rollers andsaid cutters may besimultaneously adjusted" to accommodate the tube.

4. A weld remover for tubes, comprising a carrier including a circularbody having peripheral notches and an endless groove, sa d body beingcentrally bored and formed with a centralized pilot extension forentering the tube, an annular series of anti-friction rollers carried onsaid extension, means for mounting said rollers on said extension forradial movement with respect to said extension for engagement with theinner bore of the tube, a series of grooved anti-friction rollers havingtheir axes at right angles to the axes of the first mentioned rollerswhereby said last mentioned rollers may engage the head of the tube,said grooved anti-friction rollers including stems extending slidablythrough openings in said body, the inner ends of the stems beingcontrolled intermediate the first mentioned rollers, cutters mounted insaid notches, an annular coil spring in said groove for yieldably urgingsaid cutters into engagement with the outer ends of said stems, and aspring pressed wedge pin movable longitudinally in the bore of said bodyfor engagement with the first mentioned rollers

